import time
import machine

rode_led = machine.Pin(0,machine.Pin.OUT)
gele_led = machine.Pin(1,machine.Pin.OUT)
groene_led = machine.Pin(2,machine.Pin.OUT)
drukknop1= machine.Pin(15,machine.Pin.IN)
drukknop2 = machine.Pin(14, machine.Pin.IN)



 
while True:
    if drukknop1.value() == 1:

        teller = 0                           
        print()
        for teller in range(0,8,1):
            led = machine.Pin(teller,machine.Pin.OUT)
            print(teller, end =" ")
            led.value(1)
            time.sleep(0.1)
            led.value(0)
            time.sleep(0.1)